A system for recognition of characters on a medium. The system includes a scanner for scanning a medium such as a page of printed text and graphics and producing a bit-mapped representation of the page. The bit-mapped representation of the page is then stored in a memory means such as the memory of a...http://www.google.com/patents/US5278918?utm_source=gb-gplus-sharePatent US5278918 - Optical character recognition method and apparatus using context analysis and a parsing algorithm which constructs a text data tree